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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Survivability and Protection | 15% | - Availability and survivability concepts - Protection and restoration mechanisms - Path and line protection schemes |
| Topic 2: Network Management and Operations | 20% | - NFM-T / WS-NOC management system overview - Network design with 1830 EPT / WaveSuite Planner - Performance monitoring, alarms and troubleshooting - Network commissioning and monitoring |
| Topic 3: Optical Networking Basics | 20% | - Fiber types, properties and transmission principles - Optical signal propagation and characteristics - Optical components and functions |
| Topic 4: WDM Technology and Systems | 25% | - DWDM system architecture and building blocks - Optical amplifiers and transmission engineering - Wavelength Division Multiplexing concepts |
| Topic 5: Optical Network Architecture and Nodes | 20% | - WDM node types and functionalities - Switched WDM (SWDM) principles - Network topologies and transport architectures |
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質問 # 18
What is the purpose of the validate step in the EPT design process?
正解：C
解説：
The validate step in the EPT design process is used to trigger the run design action, which is responsible for verifying the consistency of the network design and fixing any errors that may exist. During the validation process, the system will compare the configuration available on the involved network elements and the design provided by EPT, and any discrepancies will be flagged for further investigation or correction.
質問 # 19
What is the function of the express channel interface?
正解：B
解説：
Comprehensive and Detailed Explanation From Nokia Optical Networking Fundamentals:
In the context of WDM (Wavelength Division Multiplexing) node architecture, an express channel interface (often associated with OADMs or ROADMs) is specifically designed to handle "through" traffic. In a multi-node optical network, not every wavelength (channel) needs to be processed or terminated at every site it passes. To maintain signal integrity and reduce latency, these wavelengths are kept in the optical domain.
The express interface allows these optical channels-those not terminated or "dropped" at the local node-to bypass the local transponders and multiplexers, flowing directly to the downstream node. This photonic bypass avoids unnecessary O-E-O (Optical-Electrical-Optical) conversions, which would otherwise require expensive hardware and increase power consumption. By utilizing express paths, the Nokia 1830 PSS can scale to support massive core network capacities while ensuring that only the relevant traffic is diverted to the local client-facing ports.
質問 # 20
Where is the OPS card equipped to provide the optical channel protection?
正解：B
解説：
According to the Nokia's 1830 Photonic Service Switch (PSS) product documentation, the Optical Protection Switching (OPS) card is equipped in the transponder and is responsible for providing optical channel protection between the transponder and the amplifiers. The OPS card monitors the optical signal and switches to a pre-configured protection path in case of signal degradation or loss.
質問 # 21
How does a Raman pump work in the 1830 specific implementation?
正解：A
解説：
In Raman amplification, a pump laser is used to excite the Raman-active molecules in the fiber, which then amplifies the signal light as it travels in the opposite direction. In the 1830 specific implementation, the pump laser is typically a high-power laser that is launched into the fiber in the opposite direction to the signal. The pump light interacts with the Raman-active molecules in the fiber, which then amplifies the signal light as it travels in the opposite direction. This allows the Raman pump to provide a gain that increases with distance, which can be used to compensate for the loss of signal power as it travels through the fiber.
質問 # 22
How does a Raman pump work in the 1830 specific implementation?
正解：A
解説：
In Raman amplification, a pump laser is used to excite the Raman-active molecules in the fiber, which then amplifies the signal light as it travels in the opposite direction. In the 1830 specific implementation, the pump laser is typically a high-power laser that is launched into the fiber in the opposite direction to the signal. The pump light interacts with the Raman-active molecules in the fiber, which then amplifies the signal light as it travels in the opposite direction. This allows the Raman pump to provide a gain that increases with distance, which can be used to compensate for the loss of signal power as it travels through the fiber.
質問 # 23
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